I want to make the year '2020' out of coronavirus cells... how can I do it?
You can do this with Text and a Particle System.
Start by adding text, and converting it to a mesh:

Extrude the mesh a bit in edit mode, then go back to Object Mode and add a Particle System Modifier.

In the particle settings, choose &quot;Hair&quot;, and down under render, choose &quot;object&quot; and select your &quot;cell&quot; from where it says &quot;instanced object&quot; (I used an ico-sphere to represent your &quot;cell&quot;).

You can change the scale/rotation/etc.. in the particle settings panel. You can also choose to show the &quot;emitter text&quot; or not (note that there are 2 different &quot;show emitter&quot; boxes - one for the viewport and one for the render).
This last step is optional - you can see that the mesh made by the conversion from text contains some ugly topology. You can &quot;clean it up&quot; rather easily by using a Decimate Modifier set to &quot;planar&quot;.